142087331 has 4 divisors (see below), whose sum is σ = 142156200. Its totient is φ = 142018464.

The previous prime is 142087313. The next prime is 142087373. The reversal of 142087331 is 133780241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142087331 - 2¹⁴ = 142070947 is a prime.

It is a super-2 number, since 2×142087331² = 40377619261407122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142087294 and 142087303.

It is not an unprimeable number, because it can be changed into a prime (142087381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31241 + ... + 35498.

It is an arithmetic number, because the mean of its divisors is an integer number (35539050).

Almost surely, 2^142087331 is an apocalyptic number.

142087331 is a deficient number, since it is larger than the sum of its proper divisors (68869).

142087331 is an equidigital number, since it uses as much as digits as its factorization.

142087331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68868.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 142087331 is about 11920.0390519495. The cubic root of 142087331 is about 521.8172745550.

The spelling of 142087331 in words is "one hundred forty-two million, eighty-seven thousand, three hundred thirty-one".